What is a piranha's body temperature?

Like all fish, piranhas are cold-blooded, or "ectothermic", so their body temperature has a wider range than that of an endothermic animal such as a mammal or bird. Their body temperaure is reliant upon their environment. Piranhas live in rivers that have a temperature range of 24 - 30 degrees Celsius, or 75 - 86 degrees Fahrenheit.